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Hydrophobic activated carbon and preparation method thereof

A technology of activated carbon and hydrophobicity, which is applied in the field of preparation of the above-mentioned hydrophobic activated carbon, which can solve the problems of short service life and inability to maintain adsorption performance

Active Publication Date: 2021-09-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the present invention aims at the problems of short service life and inability to maintain adsorption performance of activated carbon in the prior art, and provides a kind of hydrophobic activated carbon, and also provides a preparation method of the above-mentioned hydrophobic activated carbon. Activated carbon has good hydrophobicity while maintaining a high specific surface area, which can effectively prevent free water molecules in the environment from entering the internal void of activated carbon

Method used

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  • Hydrophobic activated carbon and preparation method thereof
  • Hydrophobic activated carbon and preparation method thereof
  • Hydrophobic activated carbon and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] The preparation method of hydrophobic activated carbon of the present invention specifically comprises the steps:

[0028] (1) heat treatment of powdered or granular activated carbon at 120°C for 10 hours, and set aside;

[0029] (2) Use hydrochloric acid to adjust the pH to 8.5 with 500mL tris aqueous solution (in the tris aqueous solution, the concentration of tris is 0.05mol / L), and then add tris to tris Add 500mg of dopamine hydrochloride to the methane aqueous solution, stir magnetically at 30°C for 0.5h, then add 500mg of activated carbon from step (1) to the above solution, obtain a mixed solution after ultrasonic dispersion, continue stirring for 24h, and take out after stirring Activated carbon, after washing, dry at 120°C for 24 hours to obtain activated activated carbon;

[0030] (3) Dissolve 1.2g of 2-methylimidazole in 40mL of alcohol, add 0.06g of activated carbon to it at room temperature, then add an alcoholic solution containing 0.6g of zinc nitrate he...

Embodiment 2

[0034] The preparation method of hydrophobic activated carbon of the present invention specifically comprises the steps:

[0035] (1) heat treatment of powdered or granular activated carbon at 120°C for 8 hours, and set aside;

[0036](2) Use hydrochloric acid to adjust the pH to 7.5 with 500mL tris aqueous solution (in the tris aqueous solution, the concentration of tris is 0.05mol / L), and then add tris to tris Add 100mg of dopamine hydrochloride to the methane aqueous solution, stir magnetically at 30°C for 0.5h, then add 500mg of activated carbon from step (1) to the above solution, obtain a mixed solution after ultrasonic dispersion, continue stirring for 24h, and take out after stirring Activated carbon, after washing, dry at 120°C for 24 hours to obtain activated activated carbon;

[0037] (3) Dissolve 1.2g of 2-methylimidazole in 40mL of alcohol, add 0.06g of activated charcoal to it at room temperature, then add an alcohol solution containing 0.32g of zinc chloride to...

Embodiment 3

[0041] The preparation method of hydrophobic activated carbon of the present invention specifically comprises the steps:

[0042] (1) heat treatment of powdered or granular activated carbon at 120°C for 4 hours, and set aside;

[0043] (2) Use hydrochloric acid to adjust the pH to 11 with 500mL tris aqueous solution (in the tris aqueous solution, the concentration of tris is 0.05mol / L), and then add tris to tris Add 100mg of dopamine hydrochloride to methane aqueous solution, stir magnetically at 30°C for 0.5h, then add 2000mg of activated carbon from step (1) to the above solution, obtain a mixed solution after ultrasonic dispersion, continue stirring for 24h, and take out after stirring Activated carbon, after washing, dry at 120°C for 24 hours to obtain activated activated carbon;

[0044] (3) Dissolve 0.38g 2-ethylimidazole in 40mL alcohol, add 0.12g activated carbon therein at room temperature, then add alcohol solution containing 0.2g zinc hydroxide to obtain a reaction...

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Abstract

The invention discloses hydrophobic activated carbon which comprises activated carbon and a porous hydrophobic shell layer wrapping the outer surface of the activated carbon, wherein the porous hydrophobic shell layer is an organic metal framework ZIF-8 or an organic metal framework MAF-6. The invention also discloses a preparation method of the hydrophobic activated carbon. The porous hydrophobic shell-coated activated carbon prepared by the preparation method retains the characteristics of pore structure, microstructure and high specific surface area of original activated carbon, and maintains high adsorption performance of the porous hydrophobic shell-coated activated carbon; the hydrophobicity of the activated carbon can be maintained under high humidity, so that the service life of the adsorption material is greatly prolonged, and the adsorption capacity of the adsorption material is maintained; in a high-humidity environment, the moisture absorption weight gain of the hydrophobic activated carbon is obviously lower than that of activated carbon before hydrophobic modification, and in a high-temperature environment, the hydrophobic shell structure still does not collapse and can resist high temperature up to 150 DEG C, so that the hydrophobic activated carbon can be used for adsorption and filtration treatment under high-temperature and high-humidity conditions.

Description

technical field [0001] The present invention relates to a kind of hydrophobic activated carbon, and also relates to the preparation method of the above-mentioned hydrophobic activated carbon. Background technique [0002] Activated carbon is usually an amorphous micro-mesoporous material formed from coal, wood, coconut shell, etc. after a series of fine processing. Based on the well-developed pore structure and ultra-high specific surface area, activated carbon has excellent filtration and adsorption properties, so it is widely used in the fields of three wastes treatment, pharmaceutical manufacturing, food processing and metallurgy. Since the reduction of the specific surface area of ​​activated carbon will seriously affect its performance, it is an urgent problem to be solved in the industry to prevent the pores from being blocked during its use and to maintain a high specific surface area. [0003] Powder, granular or columnar activated carbons have excellent adsorption ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30
CPCB01J20/20B01J20/226B01J20/28026
Inventor 张友法季延正焦玄余新泉
Owner SOUTHEAST UNIV
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